JP3988550B2 - Solution transport unit and liquid ejecting apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tube, a solution transport unit, and a liquid ejecting apparatus. In particular, the present invention relates to a tube for transporting a solution, a solution transport unit, and a liquid ejecting apparatus.
[0002]
[Prior art]
An ink jet recording apparatus as a liquid ejecting apparatus prints on a recording material by ejecting ink from ejection openings provided in a recording head. The ink jet recording apparatus includes a capping member that seals the discharge port when printing is suspended, and prevents the discharge port from drying. In addition, ink may be clogged at the ejection port. In this case, the ink jet recording apparatus includes an ink transport unit, seals the discharge port with a capping member, and sucks the discharge port with a negative pressure generated by the pump through the tube to eliminate clogging.
[0003]
[Problems to be solved by the invention]
Here, since the tube which conveys ink is wound around the wheel which rotates within a tube pump, it is formed with the material which has elasticity, for example, silicon rubber. Since silicon rubber easily allows gas to pass through, the ink solvent contained in the ink easily passes through the tube. For this reason, even if the capping unit seals the discharge port, the evaporated ink solvent permeates through the tube connected to the capping unit. Therefore, the ink in the ejection port may be dried and clogged.
[0004]
Then, an object of this invention is to provide the tube, solution conveyance part, and liquid ejecting apparatus which can solve said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.
[0005]
[Means for Solving the Problems]
That is, according to the first embodiment of the present invention, the tube body is formed by extruding an elastic member into a tubular shape, and the coating body having a lower solvent permeability than the elastic member is applied to the outside of the tube body. A solution transport unit having a coating layer and transporting a solution containing a solvent, and a pump for transporting the solution inside the tube by sequentially crushing the tube from upstream to downstream in the direction of transporting the solution The pump has a holding part that holds the tube, and the tube extends at least upstream of the pump in the direction in which the solution is conveyed, a held part that is held by the holding part of the pump, and the pump A coating part that is wound around and elastically deformed by a pump. Solution transport unit is provided.
[0006]
According to a second aspect of the present invention, there is provided a liquid ejecting apparatus that ejects solution droplets containing a solvent that dissolves a solute from an ejection port of an ejection head to a target, and includes a capping member that covers the ejection port, and an elastic member. A tube body extruded into a tubular shape, and one end connected to the capping member, having an application layer formed by applying a coating having a lower solvent permeability than the elastic member to the outside of the tube body. A tube having a holding portion for holding the tube, and a pump for conveying the solution inside the tube by sequentially crushing from one end connected to the capping member to the other end direction, An extending part that extends at least upstream of the pump in a direction in which the solution is conveyed, and a cover that is held by the holding part of the pump. A holding portion and a winding portion wound around the pump and elastically deformed by the pump, the coating is applied to the extending portion, and the coating layer is provided on the winding portion No liquid ejection device is provided.
[0008]
The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are the solution of the invention. It is not always essential to the means.
[0010]
FIG. 1 is a schematic side view showing the internal configuration of the ink jet recording apparatus 10. Here, the ink jet recording apparatus 10 is an example of a liquid ejecting apparatus. The recording head of the ink jet recording apparatus 10 is an example of a liquid ejecting head of the liquid ejecting apparatus. The ejection port provided in the recording head is an example of an ejection port of the liquid ejection head. Further, the substrate is an example of a target.
[0011]
However, the present invention is not limited to these. Another example of the liquid ejecting apparatus is a color filter manufacturing apparatus that manufactures a color filter for a liquid crystal display. In this case, the color material ejecting head of the color filter manufacturing apparatus is an example of the liquid ejecting head. Still another example of the liquid ejecting apparatus is an electrode forming apparatus that forms electrodes such as an organic EL display and an FED (surface emitting display). In this case, the electrode material (conductive paste) ejecting head of the electrode forming apparatus is an example of the liquid ejecting head. Still another example of the liquid ejecting apparatus is a biochip manufacturing apparatus that manufactures a biochip. In this case, the bio-organic matter ejecting head of the biochip manufacturing apparatus and the sample ejecting head as a precision pipette are examples of the liquid ejecting head. The liquid ejecting apparatus of the present invention includes other liquid ejecting apparatuses having industrial use.
[0012]
As shown in FIG. 1, the ink jet recording apparatus 10 includes a mounting unit 12 that holds a plurality of recording objects 11, and a single recording object 11 that is fed from the mounting unit 12 for printing. The feeding unit 20, the conveyance unit 30 that transmits power in the feeding direction to the recording material 11 fed by the feeding unit 20, the printing unit 40 that performs printing on the recording material 11, and the printed recording material 11 A discharge unit 50 that transmits power in the discharge direction is provided in this order in the feeding direction.
[0013]
The feeding unit 20 includes, for example, a feeding roller 22 that rotates together with a drive shaft by a motor (not shown) and a separation pad 24. The paper feed roller 22 is substantially fan-shaped, and the drive shaft is provided at the center of an arc that forms the fan. As the paper feed roller 22 rotates, the paper feed roller 22 repeats a contact state and a separation state with respect to the separation pad 24. In the contact state, the feeding roller 22 and the separation pad 24 move the recording material 11 positioned at the top of the bundle of recording materials 11 fed from the placement unit 12 to the feeding unit 20. By sandwiching them, the recording objects 11 are separated one by one and fed to the transport unit 30. The feeding roller 22 and the hopper, which is a part of the placement unit 12, are separated from each other at the midway timing of feeding, and the recording material 11 that has not been fed is returned to the placement unit 12 and aligned. To be able to.
[0014]
The conveyance unit 30 includes a conveyance roller 32 that is rotated by a motor 60, and a conveyance driven roller 34 that rotates with the conveyance roller 32, and sandwiches the recording material 11 at a contact point between the conveyance roller 32 and the conveyance driven roller 34. The recording material 11 fed by the feeding unit 20 is fed to the lower part of the printing unit 40.
[0015]
The printing unit 40 is provided on the carriage 42 on which the ink cartridge is placed, the surface of the carriage 42 that faces the recording object 11, the recording head 44 that ejects ink, the shaft hole 46 provided in the carriage 42, and the shaft hole 46. And a guide shaft 48 that slidably supports the carriage 42 in a direction substantially perpendicular to the feeding direction, and a print control unit 49 that controls printing. The recording head 44 has a plurality of ejection openings arranged along the feeding direction of the recording material 11.
[0016]
The discharge unit 50 includes a discharge roller 52 that is rotated by a motor 60, and a discharge driven roller 54 that rotates with the discharge roller 52, and sandwiches the recording material 11 at a contact point between the discharge roller 52 and the discharge driven roller 54. Then, the recorded object 11 after printing is discharged.
[0017]
The transport driven roller 34 is provided on the upper side of the transport roller 32 and closer to the recording head 44 than the transport roller 32, and the discharge driven roller 54 is provided on the upper side of the discharge roller 52 and on the recording head 44 side of the discharge roller 52. It is done. Thereby, the recording material 11 bends downward at a position facing the printing unit 40.
[0018]
In the configuration described above, the ink jet recording apparatus 10 ejects ink while reciprocating the recording head 44 along the guide shaft 48. The ink jet recording apparatus 10 performs printing on the entire recording object 11 by feeding the recording object 11 each time the recording head 44 performs one scan. Note that the recording head 44 may perform printing on both the forward path and the backward path, and may perform printing on only one side.
[0019]
Power is transmitted from the motor 60 to the transport unit 30 and the discharge unit 50 via a single belt 62. The belt 62 is tensioned by a tensioner 64. The motor 60, the tensioner 64, the transport unit 30, and the discharge unit 50 are arranged in this order along the flow direction of the belt 62.
[0020]
FIG. 2 is a partial perspective view of the ink jet recording apparatus 10. The printing unit 40 further includes a timing belt 402, a carriage motor 404, a black ink cartridge 406, and a color ink cartridge 408.
[0021]
When the carriage motor 404 drives the timing belt 402, the carriage 42 is guided by the guide shaft 48 and reciprocates substantially at right angles to the feeding direction of the recording material 11. A recording head 44 including a black ink discharge port and a color ink discharge port is mounted on the side of the carriage 42 facing the substrate. A black ink cartridge 406 and a color ink cartridge 408 for supplying ink to the recording head 44 are detachably mounted on the carriage 42.
[0022]
The ink jet recording apparatus 10 further includes an ink transport unit 70 that transports discharged ink and a wiping unit 80. The ink transport unit 70 includes a capping unit 72 that seals the ejection port of the recording head 44, a tube 75 that transports the ink ejected by the ejection port to the capping unit 72, and a portion of the tube that is elastically deformed. A pump 76 for transporting ink and a waste liquid box 79 for storing ink transported by the pump 76 are provided in this order in the ink transport direction.
[0023]
The ink transport unit 70 is disposed in a non-printing area (home position) outside the printing area (feeding path of the recording object 11). The wiping means 80 has elasticity and is disposed in the vicinity of the end of the capping means 72 on the printing area side. The wiping means 80 is injection-molded integrally with the capping means 72 by a two-color molding method. However, the present invention is not limited to this, and the capping unit 72 and the wiping unit 80 may be formed separately.
[0024]
In the above configuration, when the ink jet recording apparatus 10 does not perform printing, the carriage 42 moves from the printing area to the non-printing area. When the recording head 44 provided on the carriage 42 moves directly above, the capping unit 72 rises to the carriage 42 side and seals the surface of the recording head 44 that has the ejection port.
[0025]
Here, in this sealed state, the pump 76 sucks air in the internal space formed by the recording head 44 and the capping member 72, thereby forcibly sucking and discharging ink from the ejection port of the recording head 44. The discharge port can be cleaned. The capping unit 72 can suppress drying of the discharge port by sealing the surface of the recording head 44 having the discharge port. Further, the capping unit 72 receives the ink ejected in the idling state during the flushing in which the recording head 44 ejects the ink droplets idly. This flushing is performed by applying a drive signal unrelated to printing to the recording head 44.
[0026]
When returning from the non-printing area to the printing area, the carriage 42 is first detached from the capping member 72. Further, as the carriage 42 moves to the non-printing area side, the wiping means 80 advances on the moving path of the recording head 44 and wipes ink on the nozzle formation surface of the recording head 44.
[0027]
FIG. 3 is a diagram illustrating the configuration of the ink transport unit 70. The ink transport unit 70 includes a capping unit 72, a tube 75, a pump 76, and a waste liquid box 79. In this figure, the pump 76 is an exploded perspective view. When the ink jet recording apparatus 10 pauses printing or when the pump 76 performs cleaning for sucking ink from the recording head 44, the capping unit 72 is in close contact with the recording head 44 and seals the ejection port. Further, when the recording head 44 performs a flushing operation or when the pump 76 sucks ink from the recording head 44, the capping unit 72 receives ink droplets discharged from the discharge ports. In the present embodiment, the ink contains water as an ink solvent. The ink also contains glycerin as a humectant.
[0028]
The tube 75 conveys the ink droplets received by the capping means 72 to the waste liquid box 79 using the pump 76 as ink waste liquid. A portion between the capping unit 72 and the pump 76 is defined as an extending portion 755. The tube 75 has at least a coating layer having a low water vapor permeability on the surface of the extending portion 755 in order to reduce the permeation of the ink solvent contained in the ink. This reduces the amount of ink solvent that passes through the tube 75. On the other hand, the tube 75 does not have an application layer in the holding part currently hold | maintained at the pump and the winding part currently wound around the pump.
[0029]
The pump 76 includes a pump frame 760, a pump wheel 770 driven by external power, and a roller 780 that is rotatably attached to the pump wheel 770. The pump 76 applies a negative pressure to the tube 75 and transports the ink waste liquid. The pump 76 is, for example, a tube pump. For example, the pump 76 rotates the pump wheel 770 by external power. The roller 780 sequentially crushes one point of the tube 75 from the upstream side to the downstream side where the ink is conveyed by the rotation of the pump foil 770. The crushed tube 75 is restored by the elastic force of the tube 75 itself, and a negative pressure is generated in the tube 75. When this negative pressure is transmitted to the upstream side of the tube 75, the ink waste liquid in the extending portion 755 is sucked and conveyed. The pump 76 conveys the waste ink liquid in the crushed tube 75 downstream. The pump 76 transports the ink waste liquid to the waste liquid box 79 via the tube 75. The waste liquid box 79 includes an absorbing material that absorbs ink waste liquid and accumulates the received ink waste liquid therein.
[0030]
As a result, the capping unit 72 of the ink transport unit 70 seals the recording head 44 and suppresses drying of the ink in the ejection port. The ink transport unit 70 sucks ink in the ejection port.
[0031]
FIG. 4 is a perspective sectional view showing the structure of the tube 75. The tube 75 includes a tube main body 752 that is an elastic member extruded into a tubular shape, and an application layer 754 that is applied to the outside of the tube main body 752 and has lower water vapor permeability than the tube main body 752. The tube body 752 is made of an elastic synthetic resin, for example, silicon rubber. Silicone rubber is resistant to bending. Therefore, the tube 75 having the tube main body 752 made of silicon rubber can be easily routed inside the ink jet recording apparatus 10 and has a high degree of design freedom. Silicon rubber has high elasticity. Therefore, the restoring force after the tube 75 is crushed by the pump 76 is large. Silicone rubber is resistant to water as an ink solvent and glycerin as a humectant. However, silicon rubber has high gas permeability. Here, taking air containing water vapor as an example, it is 3.3 × 10 ⁻⁵ cm ² / sec · MPa in an environment of 60 ° C. On the other hand, for example, the permeability of natural rubber is 2.5 × 10 ⁻⁶ cm ² / sec · MPa under the same conditions. Therefore, when the ink transport unit 70 seals the recording head 44 for a long time, water may evaporate from the ink in the ejection port through the tube 75, and the ink may be cured in the ejection port or the tube 75. In particular, in the case of pigment-based ink, the cured ink does not redissolve in water. Accordingly, when the ink is cured and the discharge port or the tube 75 is clogged, it is difficult to recover.
[0032]
In the present embodiment, the tube 75 further has a coating layer 754 containing a fluororesin on the surface. As an example, the inner diameter of the tube body 752 is 2 mm to 3 mm, and the thickness of the coating layer 754 is 10 μm to 50 μm. The length of the coating layer 754 in the longitudinal direction of the tube 75 is at least 100 mm. The fluororesin has a lower water vapor permeability than the tube main body 752. Therefore, by providing the coating layer 754 containing a fluororesin on the outside of the tube main body 752, the tube 75 can reduce the amount of water vapor that the tube transmits from the inside to the outside while maintaining elasticity. That is, the tube 75 can reduce clogging of ink in the ejection port when the ink transport unit 70 seals the recording head 44. Further, the tube 75 can reduce the curing of the ink waste liquid inside the tube 75.
[0033]
Note that water is used as the ink solvent here, but other solvents may be used instead. Other solvents are, for example, ethanol or thinner. Also, when the ink jet recording apparatus 10 uses dye-based ink instead of pigment-based ink, the tube 75 can reduce ink curing.
[0034]
FIG. 5 is a top view of the capping unit 72 included in the ink transport unit 70. FIG. 6 is a cross-sectional view of the capping unit 72 shown in FIG. The capping unit 72 includes a cap holder 720, a cap member 730 that is in close contact with the recording head 44, and an ink absorbing material 740. The cap holder 720 is made of, for example, a synthetic resin and includes a substantially rectangular opening 732. The cap member 730 is an elastic member such as an elastomer. The cap member 730 integrally forms an opening edge 734 having a substantially triangular cross-sectional shape, which is attached to the edge of the opening 732 over the entire circumference, and an inner fixed portion of the opening 732. The cap member 730 is in close contact with the surface of the recording head 44 when the capping unit 72 is in contact with the recording head 44, and can seal the recording head 44 from the outside.
[0035]
The ink absorbing material 740 absorbs ink droplets ejected by the recording head 44. The ink absorbing material 740 is a material that absorbs liquid, such as felt or sponge. The ink absorbing material 740 is held by a plurality of pin members 722 that protrude substantially perpendicularly from the bottom surface of the opening 732. Here, the plurality of pin members 722 hold the ink absorbing material 740 by crushing the tops thereof by means such as heat caulking.
[0036]
The capping unit 72 further includes a groove portion 736 in the inner bottom portion of the opening 732 and an ink discharge hole 724 formed in one end portion of the groove portion 736. The ink discharge hole 724 communicates with a tube connection pipe 726 formed integrally with the lower bottom portion of the cap holder 720. One end of a tube 75 is connected to the tube connection pipe 726. Therefore, the capping unit 72 can receive the ink droplets ejected by the recording head 44 and discharge them by the pump 76 via the tube 75.
[0037]
FIG. 7 shows a suction operation by the pump 76. The pump 76 further includes a guide member 782. The pump frame 760 holds the tube 75 on the upstream side and the downstream side of the tube support surface 762, a tube support surface 762 that regulates the outer shape of the tube 75 in an arc shape, a locking groove 764 for holding the guide member 782, respectively. Holding parts 766a and 766b. Hereinafter, a portion of the tube 75 whose outer shape is regulated in an arc shape is referred to as a winding portion 756. The pump wheel 770 has a pair of roller support grooves 772 formed with a gradient in the radial direction between the axial direction and the outer peripheral direction of the pump wheel 770, and the roller 780 is inserted into each roller support groove 772. Insertion opening 774. One roller 780 is inserted into each roller support groove 772 arranged at equal intervals on the arc of the pump wheel 770 through the insertion opening 774, is movable in the longitudinal direction of the roller support groove 772, and is centered on the axis of the roller 780. Can be mounted as rotatable. The guide member 782 is an elastic body, and is fitted into the locking groove 764 with the tip portion protruding in the axial direction of the pump wheel 770.
[0038]
When the pump wheel 770 rotates forward (in the direction of arrow A), the guide member 782 guides the roller 780 in the direction in which the roller support groove 772 rotates backward (in the direction opposite to arrow A). Accordingly, the roller 780 advances in the outer peripheral direction of the roller support groove 772 and sequentially crushes the tube 75 disposed between the tube 780 and the tube support surface 762. Here, the roller 780 crushes the tube 75 from upstream to downstream with respect to the ink waste liquid transport direction. Therefore, the roller 780 forcibly sends the gas and ink waste liquid located inside the winding portion 756 to the downstream side of the tube 75.
[0039]
Here, the winding portion 756 crushed by the pump 76 returns to its original shape due to elasticity. Therefore, when the crushed portion of the winding portion 756 returns to its original shape, the internal pressure becomes lower than that of the other tube 75 portions, that is, a negative pressure is generated. At this time, the winding portion 756 is in a state where the downstream side with respect to the ink waste liquid transport direction is sealed by the roller 780. Therefore, the pump 76 can transport the gas and the ink waste liquid existing in the tube 75 on the upstream side with respect to the ink transport direction by negative pressure.
[0040]
In the present embodiment, the center angle of the arc formed by the tube support surface 762 is 180 ° or more. Further, the pair of rollers 780 are arranged at an interval of 180 ° with respect to the center of the pump wheel 770. In other words, the arc formed by the tube support surface 762 is longer than the interval between the rollers 780 arranged on the pump wheel 770. Therefore, when the pump 76 rotates in the forward rotation direction, at least one of the pair of rollers 780 always crushes one point of the winding portion 756. That is, the pump 76 always maintains a negative pressure inside the internal tube 75 on the upstream side with respect to the ink waste liquid transport direction. Accordingly, the pump 76 can prevent the backflow of the ink waste liquid from the downstream due to the roller 780 being separated from the winding portion 756 during the operation of the pump 76.
[0041]
The holding portions 766a and 766b hold a part of the tube 75 (hereinafter referred to as the held portion 758) and hold the tube 75 by frictional force. Here, the winding portion 756 biases a force to the held portion 758 when being crushed by the roller 780 and when restoring from the crushed state. The held portion 758 does not have the coating layer 754 on the surface. Since the surface of the tube without the coating layer 754 on the surface has a large coefficient of friction, the holding portions 766a and 766b can reliably hold the held portion 758 without the coating layer 754.
[0042]
FIG. 8 shows the release state of the pump 76. When the pump wheel 770 rotates in the reverse direction (arrow B direction), the guide member 782 acts to guide the roller 780 in the rotation advance direction of the roller support groove 772 (the direction opposite to the arrow B). That is, the roller 780 moves in the inner circumferential direction of the roller support groove 772 and retreats from the tube support surface 762. As a result, the roller 780 is kept in a state where it is in light contact with the winding portion 756. Therefore, it is possible to prevent the roller 780 from crushing the winding portion 756 at the same position for a long time. That is, sticking of the winding portion 756 can be prevented.
[0043]
When the pump 76 shifts from the reverse rotation to the normal rotation, the roller 780 moves in the rotation backward direction of the roller support groove 772 by the frictional force with the winding portion 756. Therefore, it is preferable that the surface of the winding portion 756 has a large friction coefficient. For this reason, the winding part 756 does not have an application layer.
[0044]
According to the present embodiment, in the ink jet recording apparatus 10, by providing the coating layer 754 on the surface of the tube 75, the amount of water vapor that passes through the tube 75 can be reduced. Accordingly, it is possible to reduce the amount of water evaporated from the ink in the recording head 44 and the tube 75 while the capping unit 72 is sealing the recording head 44. That is, the moisture retention of the ink can be improved. Accordingly, the ink in the recording head 44 and the tube 75 is hard to be cured, and the clogging of the ink in the recording head 44 and the tube 75 can be reduced. Further, since the held portion 758 does not have the coating layer 754 on the surface, the holding portions 766a and 766b can reliably hold the held portion 758 without the coating layer 754. Further, since the winding portion 756 does not have the coating layer 754 on the surface, when the pump 76 shifts from the reverse rotation to the normal rotation, the roller 780 has a roller support groove 772 due to the frictional force with the winding portion 756. It is possible to move in the direction of rotational retreat.
[0045]
As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.
[0046]
【The invention's effect】
As is clear from the above description, according to the present invention, the clogging of the ink in the tube can be reduced by reducing the evaporation of the ink solvent from the tube. Thereby, drying in the discharge port and the tube can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an ink jet recording apparatus 10. FIG.
FIG. 2 is a partial perspective view of the ink jet recording apparatus 10;
FIG. 3 is a diagram illustrating a configuration of an ink transport unit.
4 is a perspective sectional view showing a structure of a tube 75. FIG.
FIG. 5 is a top view of a capping unit 72 provided in the ink transport unit.
6 is a cross-sectional view of the capping means 72 taken along the line AA. FIG.
7 is a perspective view showing a structure of a pump 76. FIG.
8 is a perspective view showing a structure of a pump 76. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Inkjet recording device 20 Feeding part 30 Conveying part 40 Printing part 50 Ejecting part 70 Ink conveying part 72 Capping member 75 Tube 76 Pump 79 Waste liquid box 752 Tube main body 754 Coating layer 756 Winding part 758 Holding part 766 Holding part

Claims (4)

A tube body formed by extruding an elastic member into a tubular shape, and an application layer formed by applying an application material having a lower solvent permeability than the elastic member to the outside of the tube body, and containing a solvent A tube carrying the solution;
A solution transport unit comprising a pump for transporting the solution inside the tube by sequentially crushing the tube from upstream to downstream in the direction of transporting the solution,
The pump has a holding part for holding the tube,
The tube is stretched at least upstream of the pump in the direction in which the solution is transported, a held portion held by the holding portion of the pump, and wound around the pump and elastic by the pump A winding part that is deformed;
A solution transport unit in which the coated material is applied to the stretching unit, and the coating layer is not provided on the winding unit.   The solution transport unit according to claim 1, wherein the coated material includes a fluorine-based resin.   The solution transport unit according to claim 1, wherein the tube body includes silicon rubber. A liquid ejecting apparatus that ejects solution droplets containing a solvent that dissolves a solute from an ejection port of an ejection head to a target,
A capping member that covers the injection port;
A tube main body formed by extruding an elastic member into a tubular shape, and an application layer formed by applying a coating having lower solvent permeability than the elastic member to the outside of the tube main body, one end of the capping member A tube connected to the
A holding unit for holding the tube, and a pump for conveying the solution inside the tube by sequentially crushing from one end connected to the capping member to the other end direction,
The tube is stretched at least upstream of the pump in the direction in which the solution is transported, a held portion held by the holding portion of the pump, and wound around the pump and elastic by the pump A winding part that is deformed;
The liquid ejecting apparatus, wherein the coated material is applied to the extending portion, and the coating layer is not provided on the winding portion.

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